remove elementsSeparatedByNewline as it was not used

Author: kimdv

CodeGeneration/Sources/SyntaxSupport/CommonNodes.swift

@@ -16,8 +16,7 @@ public let COMMON_NODES: [Node] = [
     name: "CodeBlockItemList",
     nameForDiagnostics: nil,
     kind: "SyntaxCollection",
-    element: "CodeBlockItem",
-    elementsSeparatedByNewline: true
+    element: "CodeBlockItem"
   ),
 
   // code-block-item = (decl | stmt | expr) ';'?

CodeGeneration/Sources/SyntaxSupport/DeclNodes.swift

@@ -111,8 +111,7 @@ public let DECL_NODES: [Node] = [
     name: "AccessorList",
     nameForDiagnostics: nil,
     kind: "SyntaxCollection",
-    element: "AccessorDecl",
-    elementsSeparatedByNewline: true
+    element: "AccessorDecl"
   ),
 
   // (value)
@@ -1296,8 +1295,7 @@ public let DECL_NODES: [Node] = [
     name: "MemberDeclList",
     nameForDiagnostics: nil,
     kind: "SyntaxCollection",
-    element: "MemberDeclListItem",
-    elementsSeparatedByNewline: true
+    element: "MemberDeclListItem"
   ),
 
   // declaration-modifier -> access-level-modifier

CodeGeneration/Sources/SyntaxSupport/ExprNodes.swift

@@ -1481,8 +1481,7 @@ public let EXPR_NODES: [Node] = [
     kind: "SyntaxCollection",
     element: "Syntax",
     elementName: "SwitchCase",
-    elementChoices: ["SwitchCase", "IfConfigDecl"],
-    elementsSeparatedByNewline: true
+    elementChoices: ["SwitchCase", "IfConfigDecl"]
   ),
 
   // switch-case -> unknown-attr? switch-case-label stmt-list

CodeGeneration/Sources/SyntaxSupport/Node.swift

@@ -30,7 +30,6 @@ public class Node {
   public let collectionElementName: String?
   public let collectionElementChoices: [String]?
   public let omitWhenEmpty: Bool
-  public let elementsSeparatedByNewline: Bool
   public let collectionElement: String
 
   /// Returns `true` if this node declares one of the base syntax kinds.
@@ -98,8 +97,7 @@ public class Node {
     element: String = "",
     elementName: String? = nil,
     elementChoices: [String]? = nil,
-    omitWhenEmpty: Bool = false,
-    elementsSeparatedByNewline: Bool = false
+    omitWhenEmpty: Bool = false
   ) {
     self.syntaxKind = name
     self.swiftSyntaxKind = lowercaseFirstWord(name: name)
@@ -159,7 +157,6 @@ public class Node {
     // from its supertype, use that.
     self.collectionElementName = elementName ?? self.collectionElement
     self.collectionElementChoices = elementChoices ?? []
-    self.elementsSeparatedByNewline = elementsSeparatedByNewline
 
     // For SyntaxCollections make sure that the elementName is set.
     precondition(!isSyntaxCollection || elementName != nil || element != "")