Drop string literal interpretation

We don't need or want to interpret string literals as their content is
none of our business and has no explicit or implicit meaning.

Partially reverts #67.

Author: FichteFoll

Terraform.sublime-syntax

@@ -254,31 +254,6 @@ contexts:
   # https://www.terraform.io/docs/language/expressions/types.html
   # https://github.com/hashicorp/hcl2/blob/master/hcl/hclsyntax/spec.md#template-expressions
   string-literals:
-    - match: (")(true)(")
-      scope: meta.string.terraform string.quoted.double.terraform
-      captures:
-        1: punctuation.definition.string.begin.terraform
-        2: constant.language.boolean.true.terraform
-        3: punctuation.definition.string.end.terraform
-    - match: (")(false)(")
-      scope: meta.string.terraform string.quoted.double.terraform
-      captures:
-        1: punctuation.definition.string.begin.terraform
-        2: constant.language.boolean.false.terraform
-        3: punctuation.definition.string.end.terraform
-    - match: (")(none|null)(")
-      scope: meta.string.terraform string.quoted.double.terraform
-      captures:
-        1: punctuation.definition.string.begin.terraform
-        2: constant.language.null.terraform
-        3: punctuation.definition.string.end.terraform
-    - match: (")(-?)(\d+)(")
-      scope: meta.string.terraform string.quoted.double.terraform
-      captures:
-        1: punctuation.definition.string.begin.terraform
-        2: keyword.operator.arithmetic.terraform
-        3: meta.number.integer.terraform constant.numeric.value.terraform
-        4: punctuation.definition.string.end.terraform
     - match: \"
       comment: Strings
       scope: punctuation.definition.string.begin.terraform

tests/syntax_test_scope.tf

@@ -2071,7 +2071,7 @@
 #     ^^^^^^^^^^ meta.function-call.identifier.terraform support.function.builtin.terraform
 #               ^ meta.function-call.arguments.terraform punctuation.section.parens.begin.terraform
 #                ^ meta.function-call.arguments.terraform string.quoted.double.terraform punctuation.definition.string.begin.terraform - constant
-#                 ^^^^ meta.function-call.arguments.terraform meta.string.terraform string.quoted.double.terraform constant.language.boolean.true.terraform
+#                 ^^^^ meta.function-call.arguments.terraform meta.string.terraform string.quoted.double.terraform
 #                     ^ meta.function-call.arguments.terraform meta.string.terraform string.quoted.double.terraform punctuation.definition.string.end.terraform - constant
 #                      ^ meta.function-call.arguments.terraform punctuation.section.parens.end.terraform
 
@@ -2442,7 +2442,6 @@
 #           ^ punctuation.section.parens.begin.terraform
 #            ^^^^^^ meta.string.terraform string.quoted.double.terraform
 #            ^ punctuation.definition.string.begin.terraform
-#             ^^^^ constant.language.boolean.true.terraform
 #                 ^ punctuation.definition.string.end.terraform
 #                  ^ punctuation.section.parens.end.terraform