syntax/parse: remove some absolute paths related to lazy-require-syntax

Since the previous version of this code was first written, Racket's
requirements seem to have relaxed---but not completely!

If *all* related module paths are made relative, then the deps
test case breaks (but only the test is pre-compiled ?!!).

If requires from disappearing module(s) to residual module(s)
use absolute module paths, it seems to work.

racket/collects/syntax/parse/private/parse.rkt

@@ -17,7 +17,7 @@
          racket/stxparam
          syntax/stx
          syntax/parse/private/residual ;; keep abs. path
-         syntax/parse/private/runtime  ;; keep abs.path 
+         "runtime.rkt"
          syntax/parse/private/runtime-reflect) ;; keep abs. path
 
 ;; ============================================================

racket/collects/syntax/parse/private/residual.rkt

@@ -7,9 +7,8 @@
 ;; ============================================================
 ;; Compile-time
 
-(require (for-syntax racket/private/sc
+(require (for-syntax racket/private/sc "residual-ct.rkt"))
-                     syntax/parse/private/residual-ct))
+(provide (for-syntax (all-from-out "residual-ct.rkt")))
-(provide (for-syntax (all-from-out syntax/parse/private/residual-ct)))
 
 (begin-for-syntax
   ;; == from runtime.rkt

racket/collects/syntax/parse/private/runtime-reflect.rkt

@@ -1,7 +1,6 @@
 #lang racket/base
-(require syntax/parse/private/residual ;; keep abs. path
+(require "residual.rkt"
-         (only-in syntax/parse/private/residual-ct ;; keep abs. path
+         (only-in "residual-ct.rkt" attr-name attr-depth)
-                  attr-name attr-depth)
          "kws.rkt")
 (provide reflect-parser
          (struct-out reified)

racket/collects/syntax/parse/private/sc.rkt

@@ -1,17 +1,10 @@
 #lang racket/base
 (require racket/lazy-require
-         "keywords.rkt")
+         "keywords.rkt"
-
+         "residual.rkt")
-;; keep and keep as abs. path -- lazy-loaded macros produce references to this
-;; must be required via *absolute module path* from any disappearing module
-;; (so for consistency etc, require absolutely from all modules)
-(require syntax/parse/private/residual)
 
 (lazy-require-syntax
- ;; load macro transformers lazily via identifier
+ ["parse.rkt"
- ;; This module path must also be absolute (not sure why,
- ;; but it definitely breaks on relative module path).
- [syntax/parse/private/parse
   (define-syntax-class
    define-splicing-syntax-class
    define-integrable-syntax-class