Dockerfile: remove unused parts of sdk and ndk in setup-android-sdk instead

Dockerfile setup script doesn't know exactly which ndk/sdk version we
are using, so can't cd to the right folder now that the version is
part of the folder name.

scripts/Dockerfile

@@ -26,11 +26,7 @@ RUN apt-get update && \
 	# Removed unused parts to make a smaller Docker image:
 	apt-get remove -yq --autoremove lsb-release software-properties-common && \
 	apt-get clean && \
-	rm -rf /var/lib/apt/lists/* && \
-	cd /home/builder/lib/android-ndk/ && \
-	rm -Rf sources/cxx-stl/system && \
-	cd /home/builder/lib/android-sdk/tools && \
-	rm -Rf emulator* lib* proguard templates
+	rm -rf /var/lib/apt/lists/*
 
 # Switch User
 USER builder:builder

scripts/setup-android-sdk.sh

@@ -24,6 +24,9 @@ if [ ! -d $ANDROID_HOME ]; then
 		$ANDROID_SDK_SHA256
 	rm -Rf android-sdk-$TERMUX_SDK_REVISION
 	unzip -q tools-$TERMUX_SDK_REVISION.zip -d android-sdk-$TERMUX_SDK_REVISION
+
+	# Remove unused parts
+	rm -Rf android-sdk-$TERMUX_SDK_REVISION/{emulator*,lib*,proguard,templates}
 fi
 
 if [ ! -d $NDK ]; then
@@ -36,6 +39,9 @@ if [ ! -d $NDK ]; then
 		$ANDROID_NDK_SHA256
 	rm -Rf android-ndk-r$TERMUX_NDK_VERSION
 	unzip -q ndk-r${TERMUX_NDK_VERSION}.zip
+
+	# Remove unused parts
+	rm -Rf android-ndk-r$TERMUX_NDK_VERSION/sources/cxx-stl/system
 fi
 
 yes | $ANDROID_HOME/cmdline-tools/bin/sdkmanager --sdk_root=$ANDROID_HOME --licenses