Drop Xmx flag from native-image.properties.

Author: fniephaus

mx.graalpython/native-image.properties

@@ -3,7 +3,7 @@
 
 Requires = language:regex language:llvm language:nfi
 
-JavaArgs = -Xmx5100M -Dpolyglot.image-build-time.PreinitializeContexts=python \
+JavaArgs = -Dpolyglot.image-build-time.PreinitializeContexts=python \
            --add-exports org.graalvm.sdk/org.graalvm.nativeimage.impl=ALL-UNNAMED
 
 # TODO --enable-all-security-services is deprecated in 22.0