perf(int256): Optimize int256 Pacakge

contract/p/gnoswap/gnsmath/sqrt_price_math_fuzz_params_test.gno

@@ -287,11 +287,6 @@ func (p *nextPriceAmount0RemoveParams) IsValid() bool {
 		return false
 	}
 
-	// Check: amountToRemove cannot be zero (line 63: division by zero in quotientCheck)
-	if amount.IsZero() {
-		return false
-	}
-
 	// Check: liquidityShifted > amountTimesSqrtPrice (line 64)
 	liquidityShifted := u256.Zero().Lsh(liquidity, Q96_RESOLUTION)
 	amountTimesSqrtPrice := u256.Zero().Mul(amount, currentSqrt)

contract/p/gnoswap/gnsmath/sqrt_price_math_test.gno

@@ -3,9 +3,9 @@ package gnsmath
 import (
 	"testing"
 
-	"gno.land/p/nt/uassert"
 	i256 "gno.land/p/gnoswap/int256"
 	u256 "gno.land/p/gnoswap/uint256"
+	"gno.land/p/nt/uassert"
 )
 
 // Test data constants
@@ -207,6 +207,16 @@ func TestSqrtPriceMath_getNextPriceAmount0Remove(t *testing.T) {
 			shouldPanic:    true,
 			panicMsg:       errInvalidPoolSqrtPrice.Error(),
 		},
+		{
+			name:           "zero_amount_pass",
+			current:        u256.NewUint(0),
+			liquidity:      u256.NewUint(6416),
+			amountToRemove: u256.NewUint(0),
+			shouldPanic:    false,
+			validate: func(t *testing.T, before, after *u256.Uint) {
+				uassert.True(t, after.IsZero(), "removal should return zero")
+			},
+		},
 	}
 
 	for _, tt := range tests {