Remove dependency which was causing build to fail for Instrumentation Tests (commons-app#4369)

Author: madhurgupta10

app/build.gradle

@@ -94,12 +94,6 @@ dependencies {
     testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.3.1"
     testImplementation 'com.facebook.soloader:soloader:0.9.0'
 
-    // Mockito and PowerMock
-    androidTestCompile ('org.powermock:powermock-mockito-release-full:1.6.0') {
-        exclude module: 'hamcrest-core'
-        exclude module: 'objenesis'
-    }
-
     // Android testing
     androidTestImplementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$KOTLIN_VERSION"
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'