Release testing clean-up: example deployment target + bundle identifier (#959)

Author: w-goog

Examples/Example-iOS_ObjC/Podfile

@@ -1,4 +1,4 @@
-platform :ios, '11.0'
+platform :ios, '12.0'
 
 use_frameworks! 
 

Examples/Example-iOS_Swift-SPM/Example.xcodeproj/project.pbxproj

@@ -293,7 +293,6 @@
 					"@executable_path/Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.google.experimental0.dev;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;
@@ -322,7 +321,6 @@
 					"@executable_path/Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.google.experimental0.dev;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_APPROACHABLE_CONCURRENCY = YES;