Don't abort on missing version.txt

This needs to be fixed upstream.

Author: thomasjfox

cmake/Arduino/System/PackagePathIndex.cmake

@@ -110,7 +110,8 @@ function(InitializeArduinoPackagePathList)
 	elseif(ARDUINO_INSTALL_PATH AND NOT "${ARDUINO_ENABLE_PACKAGE_MANAGER}"
         AND "${ARDUINO_BOARD_MANAGER_URL}" STREQUAL "")
 		message("${ARDUINO_INSTALL_PATH}")
-		file(READ "${ARDUINO_INSTALL_PATH}/lib/version.txt" _version)
+		# TJ: Needs fixing
+		# file(READ "${ARDUINO_INSTALL_PATH}/lib/version.txt" _version)
 		string(REGEX MATCH "[0-9]+\\.[0-9]" _ard_version "${_version}")
 		if (_version AND "${_ard_version}" VERSION_LESS "1.5")
 			message(WARNING "${ARDUINO_INSTALL_PATH} may be unsupported version "