Revert "Implement SIP-42 - Support for binary integer literals" (#19694)

Reverts #19405 as it was marked as needing minor release.

Author: Kordyjan

compiler/src/dotty/tools/dotc/parsing/Scanners.scala

@@ -884,7 +884,7 @@ object Scanners {
             nextChar()
             ch match {
               case 'x' | 'X' => base = 16 ; nextChar()
-              case 'b' | 'B' => base = 2  ; nextChar()
+              //case 'b' | 'B' => base = 2  ; nextChar()
               case _         => base = 10 ; putChar('0')
             }
             if (base != 10 && !isNumberSeparator(ch) && digit2int(ch, base) < 0)

docs/_docs/reference/other-new-features/binary-literals.md

@@ -332,10 +332,9 @@ Literal  ::=  [‘-’] integerLiteral
 ### Integer Literals
 
 ```ebnf
-integerLiteral   ::=  (decimalNumeral | hexNumeral | binaryNumeral) [‘L’ | ‘l’]
+integerLiteral   ::=  (decimalNumeral | hexNumeral) [‘L’ | ‘l’]
 decimalNumeral   ::=  ‘0’ | digit [{digit | ‘_’} digit]
 hexNumeral       ::=  ‘0’ (‘x’ | ‘X’) hexDigit [{hexDigit | ‘_’} hexDigit]
-binaryNumeral    ::=  ‘0’ (‘b’ | ‘B’) binaryDigit [{binaryDigit | ‘_’} binaryDigit]
 ```
 
 Values of type `Int` are all integer numbers between $-2\^{31}$ and $2\^{31}-1$, inclusive.
@@ -358,7 +357,7 @@ The numeric ranges given by these types are:
 The digits of a numeric literal may be separated by arbitrarily many underscores for purposes of legibility.
 
 > ```scala
-> 0           21_000      0x7F        -42L        0xFFFF_FFFF        0b0100_0010
+> 0           21_000      0x7F        -42L        0xFFFF_FFFF
 > ```
 
 ### Floating Point Literals

docs/_spec/01-lexical-syntax.md

@@ -81,7 +81,6 @@ subsection:
           - page: reference/other-new-features/safe-initialization.md
           - page: reference/other-new-features/type-test.md
           - page: reference/other-new-features/experimental-defs.md
-          - page: reference/other-new-features/binary-literals.md
       - title: Other Changed Features
         directory: changed-features
         index: reference/changed-features/changed-features.md

docs/sidebar.yml

@@ -77,7 +77,6 @@ subsection:
       - page: reference/other-new-features/safe-initialization.md
       - page: reference/other-new-features/type-test.md
       - page: reference/other-new-features/experimental-defs.md
-      - page: reference/other-new-features/binary-literals.md
   - title: Other Changed Features
     directory: changed-features
     index: reference/changed-features/changed-features.md