Deleting unused files, replacing obsolete with depricated and removing comments

Author: dhaval24

core/src/main/java/com/microsoft/applicationinsights/TelemetryClient.java

@@ -416,12 +416,6 @@ public void track(Telemetry telemetry) {
             throw new IllegalArgumentException("Instrumentation key cannot be undefined.");
         }
 
-//        try {
-//            telemetry.sanitize();
-//        } catch (Throwable t) {
-//            InternalLogger.INSTANCE.error("Exception while sanitizing telemetry: '%s'",t.getMessage());
-//        }
-
         if (!activateProcessors(telemetry)) {
             return;
         }

core/src/main/java/com/microsoft/applicationinsights/TelemetryConfiguration.java

@@ -186,10 +186,6 @@ public String getInstrumentationKey() {
      * @throws IllegalArgumentException when the new value is null or empty
      */
     public void setInstrumentationKey(String key) {
-        //No longer checking for UUID
-//        if (!Sanitizer.isUUID(key)) {
-//            InternalLogger.INSTANCE.trace("Telemetry Configuration: instrumentation key '%s' is not in UUID format", key);
-//        }
 
         // A non null, non empty instrumentation key is a must
         if (Strings.isNullOrEmpty(key)) {