Remove pinned CMake version from Gradle build (#1292)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1292

AGP 8.0 will now bring in a new enough CMake version to avoid internal warnings without extra configuration.

Reviewed By: cortinico

Differential Revision: D45766980

fbshipit-source-id: 7834f723c87ec76c450a94958cd36b4930a8961a

build.gradle

@@ -28,8 +28,7 @@ allprojects {
 
 ext {
     buildToolsVersion = "33.0.0"
-    ndkVersion = "23.1.7779620" // Corresponds to AGP 7.3
-    cmakeVersion = "3.18.1+"
+    ndkVersion = "23.1.7779620"
     minSdkVersion = 21
     compileSdkVersion = 33
     targetSdkVersion = 33