Revert "feat(gapic-generator): Add NullMarked annotation to generated classes" (googleapis#13573)

Reverts googleapis#13517

Fixes googleapis#13555

Author: zhumin8

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/ComplianceClient.java

@@ -41,7 +41,6 @@
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -356,7 +355,6 @@
  *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class ComplianceClient implements BackgroundResource {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/ComplianceSettings.java

@@ -43,7 +43,6 @@
 import java.io.IOException;
 import java.util.List;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -94,7 +93,6 @@
  * Guide](https://docs.cloud.google.com/java/docs/client-retries) for additional support in setting
  * retries.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class ComplianceSettings extends ClientSettings<ComplianceSettings> {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/EchoClient.java

@@ -49,7 +49,6 @@
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -365,7 +364,6 @@
  *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class EchoClient implements BackgroundResource {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/EchoSettings.java

@@ -49,7 +49,6 @@
 import java.io.IOException;
 import java.util.List;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -125,7 +124,6 @@
  *     .build();
  * }</pre>
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class EchoSettings extends ClientSettings<EchoSettings> {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/IdentityClient.java

@@ -42,7 +42,6 @@
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -287,7 +286,6 @@
  *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class IdentityClient implements BackgroundResource {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/IdentitySettings.java

@@ -45,7 +45,6 @@
 import java.io.IOException;
 import java.util.List;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -96,7 +95,6 @@
  * Guide](https://docs.cloud.google.com/java/docs/client-retries) for additional support in setting
  * retries.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class IdentitySettings extends ClientSettings<IdentitySettings> {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/MessagingClient.java

@@ -50,7 +50,6 @@
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -450,7 +449,6 @@
  *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class MessagingClient implements BackgroundResource {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/MessagingSettings.java

@@ -50,7 +50,6 @@
 import java.io.IOException;
 import java.util.List;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -126,7 +125,6 @@
  *     .build();
  * }</pre>
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class MessagingSettings extends ClientSettings<MessagingSettings> {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/SequenceServiceClient.java

@@ -43,7 +43,6 @@
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -310,7 +309,6 @@
  *
  * <p>Please refer to the GitHub repository's samples for more quickstart code snippets.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class SequenceServiceClient implements BackgroundResource {

java-showcase/gapic-showcase/src/main/java/com/google/showcase/v1beta1/SequenceServiceSettings.java

@@ -45,7 +45,6 @@
 import java.io.IOException;
 import java.util.List;
 import javax.annotation.Generated;
-import org.jspecify.annotations.NullMarked;
 
 // AUTO-GENERATED DOCUMENTATION AND CLASS.
 /**
@@ -97,7 +96,6 @@
  * Guide](https://docs.cloud.google.com/java/docs/client-retries) for additional support in setting
  * retries.
  */
-@NullMarked
 @BetaApi
 @Generated("by gapic-generator-java")
 public class SequenceServiceSettings extends ClientSettings<SequenceServiceSettings> {