Remove repo contents after migration

.gitignore

@@ -1,28 +1,3 @@
 # editor and OS artifacts
 *~
 .DS_STORE
-
-# query compilation caches
-.cache
-
-# build artifacts
-build/*
-
-# qltest projects and artifacts
-ql/test/**/*.testproj
-ql/test/**/*.actual
-ql/test/**/go.sum
-
-# Java class files
-**/*.class
-
-# binaries
-tools/bin
-tools/linux64
-tools/osx64
-tools/win64
-tools/tokenizer.jar
-main
-
-# QL pack output directories
-.codeql