Remove explicit initializers previously added for cherry picking out of order

Author: meg-gupta

test/SIL/type_lowering_unit.sil

@@ -120,9 +120,6 @@ extension GSNC: Copyable where T: Copyable  {}
 
 struct GSNE<T: ~Escapable>: ~Escapable {
     var x: T
-
-    // 60_MERGE: an explicit initializer is temporarily required until initializer inferrence is merged.
-    init(x: consuming T) { self.x = x }
 }
 
 extension GSNE: Escapable where T: Escapable {}

test/SILGen/typelowering_inverses.swift

@@ -141,7 +141,6 @@ func check(_ t: inout any NoEscapeP & ~Escapable) {}
 struct MyStruct<T: ~Copyable & ~Escapable>: ~Copyable & ~Escapable {
   var x: T
 
-  // 60_MERGE: an explicit initializer is temporarily required until initializer inferrence is merged.
   init(x: consuming T) { self.x = x }
 }