chore: Remove newly migrated repos from BOM (#7439)

* chore: Remove migrated repos from java-cloud-bom

* chore: Add spanner-jdbc back to bom

Author: lqiu96

google-cloud-bom/pom.xml

@@ -171,11 +171,6 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
-      <dependency>
-        <groupId>com.google.cloud</groupId>
-        <artifactId>google-cloud-bigquery</artifactId>
-        <version>2.62.0</version>
-      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-bigtable-bom</artifactId>
@@ -209,13 +204,6 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
-      <dependency>
-        <groupId>com.google.cloud</groupId>
-        <artifactId>google-cloud-spanner-bom</artifactId>
-        <version>6.113.0</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-spanner-jdbc</artifactId>