Remove duplicated function.

Change-Id: Ide19feba060b17d595f556060e9d8d702eb60818
diff --git a/api/rs_core_math.spec b/api/rs_core_math.spec
index 32bf818..b55ca97 100644
--- a/api/rs_core_math.spec
+++ b/api/rs_core_math.spec
@@ -1797,18 +1797,6 @@
 start:
 w: 1, 2, 3, 4
 t: f32
-name: native_sqrt
-ret: #2#1
-arg: #2#1
-comment:
- Return the square root of a value.
-version: 21
-test: noverify
-end:
-
-start:
-w: 1, 2, 3, 4
-t: f32
 name: native_sin
 ret: #2#1
 arg: #2#1
diff --git a/scriptc/rs_core_math.rsh b/scriptc/rs_core_math.rsh
index f12a3b9..c7cc331 100644
--- a/scriptc/rs_core_math.rsh
+++ b/scriptc/rs_core_math.rsh
@@ -8743,42 +8743,6 @@
 
 #if (defined(RS_VERSION) && (RS_VERSION >= 21))
 /*
- * Return the square root of a value.
- *
- * Supported by API versions 21 and newer.
- */
-extern float __attribute__((const, overloadable))native_sqrt(float);
-#endif
-
-#if (defined(RS_VERSION) && (RS_VERSION >= 21))
-/*
- * Return the square root of a value.
- *
- * Supported by API versions 21 and newer.
- */
-extern float2 __attribute__((const, overloadable))native_sqrt(float2);
-#endif
-
-#if (defined(RS_VERSION) && (RS_VERSION >= 21))
-/*
- * Return the square root of a value.
- *
- * Supported by API versions 21 and newer.
- */
-extern float3 __attribute__((const, overloadable))native_sqrt(float3);
-#endif
-
-#if (defined(RS_VERSION) && (RS_VERSION >= 21))
-/*
- * Return the square root of a value.
- *
- * Supported by API versions 21 and newer.
- */
-extern float4 __attribute__((const, overloadable))native_sqrt(float4);
-#endif
-
-#if (defined(RS_VERSION) && (RS_VERSION >= 21))
-/*
  * Return the aproximate sqrt(v).
  *
  * Supported by API versions 21 and newer.