refactor(build): improve JVM opt-in flag usage

It's better to remove the opt-in flag, rather than add the library

Author: david-allison

build.gradle.kts

@@ -116,8 +116,10 @@ subprojects {
                     compilerArgs += "-XXLanguage:+ExplicitBackingFields"
                 }
 
-                if (project.name != "api") {
+                if (project.path !in listOf(":api", ":common")) {
                     compilerArgs += "-opt-in=kotlinx.coroutines.ExperimentalCoroutinesApi"
+                }
+                if (project.path != ":api") {
                     compilerArgs += "-Xcontext-parameters"
                 }
                 freeCompilerArgs = compilerArgs

common/build.gradle.kts

@@ -63,7 +63,4 @@ dependencies {
     testFixturesImplementation(libs.jakewharton.timber)
     testFixturesImplementation(libs.slf4j.api)
     testFixturesImplementation(libs.androidx.annotation)
-    // Required so the ExperimentalCoroutinesApi opt-in (applied globally) doesn't cause
-    // an "unresolved" warning, which is treated as an error due to allWarningsAsErrors
-    testFixturesImplementation(libs.kotlinx.coroutines.core)
 }