Tests/Instrumentation: Remove unused files

Tests/RunCMake/Instrumentation/cmake-command-non-int-version-result.txt

@@ -1 +0,0 @@
-1

Tests/RunCMake/Instrumentation/cmake-command-non-int-version-stderr.txt

@@ -1,2 +0,0 @@
-CMake Error at CMakeLists\.txt:37 \(cmake_instrumentation\):
-  cmake_instrumentation given a non-integer DATA_VERSION\.

Tests/RunCMake/Instrumentation/cmake-command-unsupported-version-result.txt

@@ -1 +0,0 @@
-1

Tests/RunCMake/Instrumentation/cmake-command-unsupported-version-stderr.txt

@@ -1,3 +0,0 @@
-CMake Error at CMakeLists\.txt:44 \(cmake_instrumentation\):
-  cmake_instrumentation given an unsupported API_VERSION "0" \(the only
-  currently supported version is 1\)\.