general cleanups. Removed lots of unused code and redundant error checks

src/lib/common/executable.c

@@ -82,8 +82,6 @@ static const InstrInfo instr_table[] = {
 	[OPCODE_GRT]     = {"GRT",  0, NULL},
 	[OPCODE_LEQ]     = {"LEQ",  0, NULL},
 	[OPCODE_GEQ]     = {"GEQ",  0, NULL},
-	[OPCODE_AND]     = {"AND",  0, NULL},
-	[OPCODE_OR]      = {"OR",   0, NULL},
 	[OPCODE_ASS]     = {"ASS",  1, (OperandType[]) {OPTP_STRING}},
 	[OPCODE_POP]     = {"POP",  1, (OperandType[]) {OPTP_INT}},
 	[OPCODE_CALL]    = {"CALL", 2, (OperandType[]) {OPTP_INT, OPTP_INT}},

src/lib/common/executable.h

@@ -67,8 +67,6 @@ typedef enum {
 	OPCODE_GRT,
 	OPCODE_LEQ,
 	OPCODE_GEQ,
-	OPCODE_AND,
-	OPCODE_OR,
 	OPCODE_ASS,
 	OPCODE_POP,
 	OPCODE_CALL,