Remove mandrill_128.r11.ktx from resources directory

Review URL: https://codereview.chromium.org/449503003
diff --git a/resources/mandrill_128.r11.ktx b/resources/mandrill_128.r11.ktx
deleted file mode 100644
index 932ac4c..0000000
--- a/resources/mandrill_128.r11.ktx
+++ /dev/null
Binary files differ