perf: remove unnecessary transforms to reduce layer count and improve scrolling performance (#6900)

* fix: remove unnecessary transforms to reduce layer count and improve scrolling performance

* fix: remove unnecessary transform from base-icon to reduce layer count

---------

Co-authored-by: xueyuan <xueyuan@vanchen.com>

Author: william-xue

src/_internal/icon/src/styles/index.cssr.ts

@@ -8,7 +8,6 @@ export default cB('base-icon', `
   display: inline-block;
   position: relative;
   fill: currentColor;
-  transform: translateZ(0);
 `, [
   c('svg', `
     height: 1em;

src/icon/src/styles/index.cssr.ts

@@ -12,7 +12,6 @@ export default cB('icon', `
   display: inline-block;
   position: relative;
   fill: currentColor;
-  transform: translateZ(0);
 `, [
   cM('color-transition', {
     transition: 'color .3s var(--n-bezier)'

src/tree/src/styles/index.cssr.ts

@@ -52,7 +52,6 @@ export default cB('tree', `
     padding: var(--n-node-wrapper-padding);
   `),
   cB('tree-node', `
-    transform: translate3d(0,0,0);
     position: relative;
     display: flex;
     border-radius: var(--n-node-border-radius);