glsl: Remove completed items from the TODO list

src/glsl/TODO

@@ -11,28 +11,12 @@
 
 1.30 features:
 
-- Implement AST-to-HIR conversion of bit-shift operators.
-
-- Implement AST-to-HIR conversion of bit-wise {&,|,^,!} operators.
-
 - Implement AST-to-HIR conversion of switch-statements
   - switch
   - case
   - Update break to correcly handle mixed nexting of switch-statements
     and loops.
 
-- Handle currently unsupported constant expression types
-  - ir_unop_bit_not
-  - ir_binop_mod
-  - ir_binop_lshift
-  - ir_binop_rshift
-  - ir_binop_bit_and
-  - ir_binop_bit_xor
-  - ir_binop_bit_or
-
-- Implement support for 1.30 style shadow compares which only return a float
-  instead of a vec4.
-
 - Implement support for gl_ClipDistance.  This is non-trivial because
   gl_ClipDistance is exposed as a float[8], but all hardware actually
   implements it as vec4[2].