Revert "internal/shader: Bug fix: Treat a non-typed consntat argument as a float"

This reverts commit 960b3796b2.

internal/shader/expr.go

@@ -200,13 +200,6 @@ func (cs *compileState) parseExpr(block *block, expr ast.Expr, markLocalVariable
 				cs.addError(e.Pos(), fmt.Sprintf("single-value context and multiple-value context cannot be mixed: %s", e.Fun))
 				return nil, nil, nil, false
 			}
-			// If the argument is a non-typed constant value, treat is as a float value (#1874).
-			for i, e := range es {
-				if e.Type == shaderir.NumberExpr && e.ConstType == shaderir.ConstTypeNone {
-					e.ConstType = shaderir.ConstTypeFloat
-					ts[i] = shaderir.Type{Main: shaderir.Float}
-				}
-			}
 			args = append(args, es...)
 			argts = append(argts, ts...)
 			stmts = append(stmts, ss...)

internal/shader/testdata/issue1874.expected.vs

@@ -1,6 +0,0 @@
-void F0(out float l0);
-
-void F0(out float l0) {
-	l0 = (sin(1.0000000000e-01)) + (cos(2.0000000000e-01));
-	return;
-}

internal/shader/testdata/issue1874.go

@@ -1,9 +0,0 @@
-package main
-
-func Foo() float {
-	const (
-		s = 0.1
-		c = 0.2
-	)
-	return sin(s) + cos(c)
-}