no :: in func decls

examples/programs/compound_assignment/main.bro

@@ -1,7 +1,7 @@
 # Milestone 6: compound assignment (`+=`, `-=`, `*=`, `/=`) and the binary
 # arithmetic operators `-`, `*`, `/` with multiplicative precedence.
 
-check_float :: func() i32 {
+check_float func() i32 {
 	x f64 = 10.0
 	x /= 4.0 # 2.5
 	x *= 2.0 # 5.0
@@ -13,7 +13,7 @@ check_float :: func() i32 {
 	return 0
 }
 
-check_unsigned :: func() i32 {
+check_unsigned func() i32 {
 	n u32 = 100
 	n /= 7 # 14 (truncating integer division)
 	n -= 4 # 10
@@ -23,7 +23,7 @@ check_unsigned :: func() i32 {
 	return 0
 }
 
-main :: func() i32 {
+main func() i32 {
 	total i32 = 0
 	total += 10 # 10
 	total -= 3  # 7