Remove useless comments from BrainFuck tests.

tests/data/brainfuck/array.bf

@@ -3,20 +3,4 @@
 >+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>
 >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>
 >+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>
-<<<<<<<<<<
-first put the desired index in front of the array
-++++
-we are done if there is a zero in the current tag cell
-[
-decrement the current tag cell
--
-move the value in the current tag cell to the next if it is not zero
-[>>+<<-]
-move to next tag cell
->>
-we found it: print the desired element
-]>.
-now print another
-<<<<<<<<<
-++
-[-[>>+<<-]>>]>.
+<<<<<<<<<<++++[-[>>+<<-]>>]>.<<<<<<<<<++[-[>>+<<-]>>]>.

tests/data/brainfuck/hello_world.bf

@@ -1 +1 @@
-++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.
+++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.

tests/data/brainfuck/sierpinski.bf

@@ -1,5 +1 @@
-++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[
-    -<<<[
-        ->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<
-    ]>.>+[>>]>+
-]
+++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[-<<<[->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<]>.>+[>>]>+]