Clean up rustc-literal-escaper usage in rust-analyzer

Cargo.lock

@@ -1985,7 +1985,6 @@ dependencies = [
  "indexmap",
  "itertools",
  "parser",
- "ra-ap-rustc_lexer",
  "rayon",
  "rowan",
  "rustc-hash 2.0.0",

Cargo.toml

@@ -136,6 +136,7 @@ pulldown-cmark-to-cmark = "10.0.4"
 pulldown-cmark = { version = "0.9.0", default-features = false }
 rayon = "1.8.0"
 rustc-hash = "2.0.0"
+rustc-literal-escaper = "0.0.2"
 semver = "1.0.14"
 serde = { version = "1.0.192" }
 serde_derive = { version = "1.0.192" }

crates/parser/Cargo.toml

@@ -14,7 +14,7 @@ rust-version.workspace = true
 [dependencies]
 drop_bomb = "0.1.5"
 ra-ap-rustc_lexer.workspace = true
-rustc-literal-escaper = "0.0.2"
+rustc-literal-escaper.workspace = true
 tracing = { workspace = true, optional = true }
 
 edition.workspace = true

crates/syntax/Cargo.toml

@@ -17,14 +17,12 @@ either.workspace = true
 itertools.workspace = true
 rowan = "=0.15.15"
 rustc-hash.workspace = true
-rustc-literal-escaper = "0.0.2"
+rustc-literal-escaper.workspace = true
 indexmap.workspace = true
 smol_str.workspace = true
 triomphe.workspace = true
 tracing.workspace = true
 
-ra-ap-rustc_lexer.workspace = true
-
 parser.workspace = true
 stdx.workspace = true