[gardening] Clean up many String computed vars

stdlib/public/core/StringCharacterView.swift

@@ -35,25 +35,20 @@ extension String: BidirectionalCollection {
   /// The position of the first character in a nonempty string.
   ///
   /// In an empty string, `startIndex` is equal to `endIndex`.
-  @inlinable
-  public var startIndex: Index {
-    @inline(__always) get { return _guts.startIndex }
-  }
+  @inlinable @inline(__always)
+  public var startIndex: Index { return _guts.startIndex }
 
   /// A string's "past the end" position---that is, the position one greater
   /// than the last valid subscript argument.
   ///
   /// In an empty string, `endIndex` is equal to `startIndex`.
-  @inlinable
-  public var endIndex: Index {
-    @inline(__always) get { return _guts.endIndex }
-  }
+  @inlinable @inline(__always)
+  public var endIndex: Index { return _guts.endIndex }
 
   /// The number of characters in a string.
+  @inline(__always)
   public var count: Int {
-    @inline(__always) get {
-      return distance(from: startIndex, to: endIndex)
-    }
+    return distance(from: startIndex, to: endIndex)
   }
 
   /// Returns the position immediately after the given index.
@@ -190,16 +185,14 @@ extension String: BidirectionalCollection {
   ///
   /// - Parameter i: A valid index of the string. `i` must be less than the
   ///   string's end index.
-  @inlinable
+  @inlinable @inline(__always)
   public subscript(i: Index) -> Character {
-    @inline(__always) get {
-      _boundsCheck(i)
+    _boundsCheck(i)
 
-      let i = _guts.scalarAlign(i)
-      let distance = _characterStride(startingAt: i)
-      return _guts.errorCorrectedCharacter(
-        startingAt: i._encodedOffset, endingAt: i._encodedOffset &+ distance)
-    }
+    let i = _guts.scalarAlign(i)
+    let distance = _characterStride(startingAt: i)
+    return _guts.errorCorrectedCharacter(
+      startingAt: i._encodedOffset, endingAt: i._encodedOffset &+ distance)
   }
 
   @inlinable @inline(__always)