fix: simplify build.gradle by removing unnecessary sections and retaining essential configurations

Author: hebertcisco

android/build.gradle

@@ -1,24 +1,18 @@
-// Top-level build file where you can add configuration options common to all sub-projects/modules.
+apply plugin: 'com.android.library'
 
-buildscript {
-    repositories {
-        google()
-        mavenCentral()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:1.3.0'
+android {
+    namespace "com.microsoft.codepush.react"
+    compileSdkVersion 33
 
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
+    defaultConfig {
+        minSdkVersion 21
+        targetSdkVersion 33
+        versionCode 1
+        versionName "1.0"
     }
 }
 
-allprojects {
-    android {
-        namespace "com.microsoft.codepush.react"
-    }
-    repositories {
-        mavenLocal()
-        mavenCentral()
-    }
-}
+repositories {
+    mavenLocal()
+    mavenCentral()
+}