fix extern.h

Author: tequdev

contracts/utils/extern.h

@@ -43,12 +43,6 @@ float_compare(int64_t float1, int64_t float2, uint32_t mode);
 extern int64_t
 float_divide(int64_t float1, int64_t float2);
 
-extern int64_t
-float_exponent(int64_t float1);
-
-extern int64_t
-float_exponent_set(int64_t float1, int32_t exponent);
-
 extern int64_t
 float_int(int64_t float1, uint32_t decimal_places, uint32_t abs);
 
@@ -89,9 +83,6 @@ float_set(int32_t exponent, int64_t mantissa);
 extern int64_t
 float_sign(int64_t float1);
 
-extern int64_t
-float_sign_set(int64_t float1, uint32_t negative);
-
 extern int64_t
 float_sto(
     uint32_t write_ptr,
@@ -204,9 +195,6 @@ slot_count(uint32_t slot);
 extern int64_t
 slot_float(uint32_t slot_no);
 
-extern int64_t
-slot_id(uint32_t write_ptr, uint32_t write_len, uint32_t slot);
-
 extern int64_t
 slot_set(uint32_t read_ptr, uint32_t read_len, uint32_t slot);