Remove obsolete files

microbenchmarks/cpp/BENCHMARKS_CLANG.txt

microbenchmarks/cpp/BENCHMARKS_GPP.txt

microbenchmarks/cpp/clangpp.txt

microbenchmarks/cpp/gpp.txt

microbenchmarks/cpp/integer_boolean/big_integer/runtimes.txt

...hmarks/cpp/integer_boolean/primitive_integer/runtimes.txt

microbenchmarks/cpp/runtimes.txt

microbenchmarks/cpp/set/runtimes.txt

...rks/java/integer_boolean/Clojure_Big_Integer/runtimes.txt

...nteger_boolean/Clojure_Big_Integer_From_Java/runtimes.txt

...hmarks/java/integer_boolean/Java_Big_Integer/runtimes.txt

...n/Java_Primitive_Integer/BENCHMARKS_HYBRID_PRIMITIVES.txt

...arks/java/integer_boolean/Java_Primitive_Integer/java.txt

.../java/integer_boolean/Java_Primitive_Integer/runtimes.txt

microbenchmarks/java/set/Clojure_Set/runtimes.txt

microbenchmarks/java/set/Clojure_Set_From_Java/runtimes.txt

microbenchmarks/java/set/Java_Nonpersistent/runtimes.txt

...java/set/Java_Persistent/BENCHMARKS_HYBRID_PRIMITIVES.txt

microbenchmarks/java/set/Java_Persistent/java.txt

microbenchmarks/java/set/Java_Persistent/runtimes.txt