Don't remove darwin SDK in Docker file for compose-web

Because for some reason linux config refers to it

Here's this config I need later discuss with fellow googlers

<project
path="prebuilts/fullsdk-darwin/platforms/android-30"
name="platform/prebuilts/fullsdk/platforms/android-30"
revision="master"
clone-depth="1">
    <linkfile src="." dest="prebuilts/fullsdk-linux/platforms/android-30" />
</project>

ci/docker/compose-web/Dockerfile

@@ -36,7 +36,6 @@ RUN ln -sf /androidx-main/prebuilts/ /mnt/agent/prebuilts
 RUN ln -sf /androidx-main/external /mnt/agent/external
 
 RUN rm -rf /androidx-main/frameworks \
-           /androidx-main/prebuilts/fullsdk-darwin \
            /androidx-main/prebuilts/jdk/jdk11/darwin-x86 \
            /androidx-main/prebuilts/jdk/jdk8/darwin-x86