Revert "Create GPUImageKuwaharaFilter.java"

This reverts commit b7265a249a17fe840b71f7a5e1e734742fa04f68.
Revert "Create GPUImageKuwaharaRadius3Filter.java"

This reverts commit 6913fe79ad60c9fdd95d5ae0854663700dcf49e0.
Merge pull request #3 from javierpuntonet/develop

Develop