vim: remove support for obsolete attribute syntax

Bracketed attributes have not been supported since pre-1.0.  Let us consider
them obsoleted.

Author: compnerd

utils/vim/syntax/swift.vim

@@ -49,14 +49,12 @@ syn keyword swiftKeyword
       \ while
 
 syn keyword swiftTypeDefinition class extension protocol struct typealias enum skipwhite nextgroup=swiftTypeName
-syn region swiftTypeAttributes start="\[" end="\]" contained skipwhite nextgroup=swiftTypeName
 syn match swiftTypeName /\<[A-Za-z_][A-Za-z_0-9\.]*\>/ contained nextgroup=swiftTypeParameters
 
 syn region swiftTypeParameters start="<" end=">" contained
 
 syn keyword swiftMutating mutating skipwhite nextgroup=swiftFuncDefinition
-syn keyword swiftFuncDefinition func skipwhite nextgroup=swiftFuncAttributes,swiftFuncName,swiftOperator
-syn region swiftFuncAttributes start="\[" end="\]" contained skipwhite nextgroup=swiftFuncName,swiftOperator
+syn keyword swiftFuncDefinition func skipwhite nextgroup=swiftFuncName,swiftOperator
 syn match swiftFuncName /\<[A-Za-z_][A-Za-z_0-9]*\>/ contained skipwhite nextgroup=swiftTypeParameters
 syn keyword swiftFuncKeyword subscript init destructor nextgroup=swiftTypeParameters
 
@@ -68,8 +66,8 @@ syn keyword swiftDefinitionModifier static public internal private
 
 syn match swiftImplicitVarName /\$\<[A-Za-z_0-9]\+\>/
 
-syn match swiftTypeDeclaration /:/ skipwhite nextgroup=swiftTypeAttributes,swiftTypeName
-syn match swiftTypeDeclaration /->/ skipwhite nextgroup=swiftTypeAttributes,swiftTypeName
+syn match swiftTypeDeclaration /:/ skipwhite nextgroup=swiftTypeName
+syn match swiftTypeDeclaration /->/ skipwhite nextgroup=swiftTypeName
 
 syn keyword swiftIdentifierKeyword metatype super self Self
 
@@ -111,11 +109,9 @@ hi def link swiftKeyword Statement
 hi def link swiftTypeDefinition Define
 hi def link swiftTypeName Type
 hi def link swiftTypeParameters Special
-hi def link swiftTypeAttributes PreProc
 hi def link swiftFuncDefinition Define
 hi def link swiftDefinitionModifier Define
 hi def link swiftFuncName Function
-hi def link swiftFuncAttributes PreProc
 hi def link swiftFuncKeyword Function
 hi def link swiftVarDefinition Define
 hi def link swiftVarName Identifier