remove unused test dep (joda) from fiam (#985)

Author: prakhar1989

firebase-inappmessaging/firebase-inappmessaging.gradle

@@ -141,7 +141,6 @@ dependencies {
     testImplementation 'androidx.test:runner:1.2.0'
     testImplementation 'org.robolectric:robolectric:4.2'
     testImplementation 'io.grpc:grpc-testing:1.21.0'
-    testImplementation 'joda-time:joda-time:2.9.2'
 
     androidTestImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
@@ -151,7 +150,6 @@ dependencies {
     androidTestImplementation 'io.grpc:grpc-testing:1.21.0'
     androidTestImplementation 'com.linkedin.dexmaker:dexmaker:2.25.0'
     androidTestImplementation 'com.linkedin.dexmaker:dexmaker-mockito:2.25.0'
-    androidTestImplementation 'joda-time:joda-time:2.9.2'
 
     androidTestAnnotationProcessor 'com.google.dagger:dagger-compiler:2.24'
 }