chore(stdlib): Cleanup old trig func from Number lib (#2169)

stdlib/number.gr

@@ -661,28 +661,6 @@ provide let parse = input => {
   }
 }
 
-/**
- * Computes how many times pi has to be subtracted to achieve the required bounds for sin.
- */
-let reduceToPiBound = (radians: Number) => {
-  floor(radians / pi)
-}
-
-/**
- * Computes the sine of a number using Chebyshev polynomials. Requires the input to be bounded to (-pi, pi). More information on the algorithm can be found here: http://mooooo.ooo/chebyshev-sine-approximation/.
- */
-let chebyshevSine = (radians: Number) => {
-  let pi_minor = -0.00000008742278
-  let x2 = radians * radians
-  let p11 = 0.00000000013291342
-  let p9 = p11 * x2 + -0.000000023317787
-  let p7 = p9 * x2 + 0.0000025222919
-  let p5 = p7 * x2 + -0.00017350505
-  let p3 = p5 * x2 + 0.0066208798
-  let p1 = p3 * x2 + -0.10132118
-  (radians - pi - pi_minor) * (radians + pi + pi_minor) * p1 * radians
-}
-
 @unsafe
 let rf = z => {
   // see: musl/src/math/asin.c and SUN COPYRIGHT NOTICE at top of file