Update operators.md

Incorporate suggestions from Boriel

Author: MrKOSMOS

docs/operators.md

@@ -41,8 +41,6 @@ which is _wrong_. If in doubt, use always parenthesis to enforce the desired eva
 
 Logicals operators are like in ZX Spectrum Basic. Their result can be either _False_ (which is represented with 0)
 or _True_, which might be any other value. <u>Don't expect _True_ value number to be always **1**</u>.
-If you need 0/1 values for boolean evaluations, use `--strict-boolean` [compiler option](zxb.md#command-line-options).
-This might add a little overhead to boolean evaluations, tough.
 
 Operator arguments must be numbers and the result is an unsigned byte value. For binary operators,
 if arguments are of different types they are [converted](cast.md) to a common type before being evaluated: