disable with-tr-contracts for now

Running with-tr-contracts as-is takes an unreasonable
amount of time because the tests are run w/o recompiling
typed racket. We need to find a way to make this more
reasonable (i.e. make sure we recompile before running
the unit tests) before enabling them for DrDr again.

typed-racket-test/with-tr-contracts.rkt

@@ -1,10 +1,11 @@
 #lang racket
 
-(void (putenv "PLT_TR_CONTRACTS" "1"))
+#;(void (putenv "PLT_TR_CONTRACTS" "1"))
 
 (define ns (make-base-namespace))
 (current-namespace ns)
 (use-compiled-file-paths null)
 
+#;
 ((dynamic-require 'typed-racket-test/main 'go/text)
  (dynamic-require 'typed-racket-test/main 'unit-tests))