Remove several unnecessary TR requires

pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/colon.rkt

@@ -1,6 +1,6 @@
 #lang racket/base
 
-(require (for-syntax racket/base syntax/parse unstable/sequence unstable/syntax
+(require (for-syntax racket/base syntax/parse unstable/syntax
                      "../private/parse-classes.rkt"
                      "../utils/disappeared-use.rkt"
                      (only-in "../utils/tc-utils.rkt" tc-error/stx))

pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/typecheck/tc-app-helper.rkt

@@ -2,7 +2,6 @@
 
 (require "../utils/utils.rkt"
          racket/match unstable/list unstable/sequence racket/set racket/list
-         syntax/stx
          (only-in srfi/1 unzip4) (only-in racket/list make-list)
          (contract-req)
          (typecheck check-below tc-subst)

pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/types/subtype.rkt

@@ -1,7 +1,6 @@
 #lang racket/base
 (require (except-in "../utils/utils.rkt" infer)
          racket/match racket/function racket/lazy-require racket/list
-         racket/unsafe/ops
          (prefix-in c: (contract-req))
          (rep type-rep filter-rep object-rep rep-utils)
          (utils tc-utils)

pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/utils/any-wrap.rkt

@@ -1,6 +1,6 @@
 #lang racket/base
 
-(require racket/match racket/contract/base racket/contract/combinator
+(require racket/match racket/contract/combinator
          racket/fixnum racket/flonum
          racket/set
          (only-in (combine-in racket/private/promise)

pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/utils/tc-utils.rkt

@@ -6,7 +6,7 @@ don't depend on any other portion of the system
 |#
 
 (require syntax/source-syntax "disappeared-use.rkt"
-         racket/list racket/match racket/promise racket/string
+         racket/match racket/promise racket/string
          syntax/parse (for-syntax racket/base syntax/parse)
          (only-in unstable/sequence in-slice))