no :: in func decls

examples/programs/control_flow/main.bro

@@ -1,9 +1,9 @@
 # Milestone 5 foundation: booleans, comparisons, logical ops, if/else if/else.
 
-printf :: c_func(format *c_char, ...) c_int
+printf c_func(format *c_char, ...) c_int
 
 # Returns a distinct code per range using if / else if / else and comparisons.
-classify :: func(n i32) i32 {
+classify func(n i32) i32 {
 	if n < 0 {
 		return 1
 	} else if n == 0 {
@@ -17,12 +17,12 @@ classify :: func(n i32) i32 {
 
 # A bool-returning function with a visible side effect, used to prove
 # short-circuit evaluation: it must only print when actually evaluated.
-noisy :: func() bool {
+noisy func() bool {
 	_ = printf("rhs-evaluated\n")
 	return true
 }
 
-main :: func() i32 {
+main func() i32 {
 	total i32 = 0
 
 	# comparisons drive if / else if / else