Revert "sink tuples by values (#24731)"

This reverts commit b9d3348dab.

compiler/ccgutils.nim

@@ -101,11 +101,7 @@ proc ccgIntroducedPtr*(conf: ConfigRef; s: PSym, retType: PType): bool =
       result = true           # ordinary objects are always passed by reference,
                               # otherwise casting doesn't work
   of tyTuple:
-    if s.typ.kind == tySink:
-      # it's a sink, so we pass it by value
-      result = false
-    else:
-      result = (getSize(conf, pt) > conf.target.floatSize*3) or (optByRef in s.options)
+    result = (getSize(conf, pt) > conf.target.floatSize*3) or (optByRef in s.options)
   else:
     result = false
   # first parameter and return type is 'lent T'? --> use pass by pointer

tests/arc/tarcmisc.nim

@@ -33,7 +33,6 @@ copying
 123
 42
 @["", "d", ""]
-mutate: 1
 ok
 destroying variable: 20
 destroying variable: 10
@@ -883,18 +882,3 @@ proc test_18070() = # bug #18070
   doAssert msg == "", "expected empty string but got: " & $msg
 
 test_18070()
-
-type AnObject = tuple
-  a: string
-  b: int
-  c: int
-
-proc mutate(a: sink AnObject) =
-  `=wasMoved`(a)
-  echo "mutate: 1"
-
-# echo "Value is: ", obj.value
-proc bar =
-  mutate(("1.2", 0, 0))
-
-bar()