Update build.gradle (#329)

Revert changes to agp package.

Author: kenjdavidson

android/build.gradle

@@ -16,12 +16,6 @@ def getExtOrDefault(name, fallback) {
 }
 
 android {
-    def agpVersion = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION
-    // Check AGP version for backward compatibility w/react-native versions still on gradle plugin 6
-    if (agpVersion.tokenize('.')[0].toInteger() >= 7) {
-        namespace = "kjd.reactnative.android"
-    }
-
     compileSdkVersion getExtOrDefault('compileSdkVersion', 34)
     buildToolsVersion getExtOrDefault('buildToolsVersion', "34.0.0")