feat(es/minifier): Remove needless blocks (#10234)

**Description:**

I postponed this while working on `dead_branch_remover` removal PR.

Author: kdy1

crates/swc/tests/fixture/issues-4xxx/4841/output/index.js

@@ -1,8 +1,6 @@
 global._processChunk = function r(r, c, i) {
     if (r) {
-        if (!c) {
-            return true;
-        }
+        if (!c) return true;
         var i = this.write();
         return (i.callback = callback), void 0;
     }

crates/swc/tests/libs-size.snapshot.md

@@ -1,14 +1,14 @@
 | File | Original Size | Compressed Size | Gzipped Size |
 | --- | --- | --- | --- |
-| antd.js | 6.38 MiB | 2.05 MiB | 444.54 KiB |
+| antd.js | 6.38 MiB | 2.05 MiB | 444.51 KiB |
 | d3.js | 542.74 KiB | 259.02 KiB | 85.06 KiB |
-| echarts.js | 3.41 MiB | 971.34 KiB | 313.43 KiB |
-| jquery.js | 280.89 KiB | 87.09 KiB | 30.15 KiB |
+| echarts.js | 3.41 MiB | 971.32 KiB | 313.35 KiB |
+| jquery.js | 280.89 KiB | 87.12 KiB | 30.16 KiB |
 | lodash.js | 531.35 KiB | 68.18 KiB | 24.52 KiB |
-| moment.js | 169.83 KiB | 56.90 KiB | 18.18 KiB |
-| react.js | 70.45 KiB | 22.28 KiB | 8.01 KiB |
-| terser.js | 1.08 MiB | 444.89 KiB | 120.46 KiB |
-| three.js | 1.19 MiB | 628.02 KiB | 154.56 KiB |
-| typescript.js | 10.45 MiB | 3.17 MiB | 845.72 KiB |
-| victory.js | 2.30 MiB | 689.65 KiB | 153.65 KiB |
-| vue.js | 334.13 KiB | 112.97 KiB | 41.66 KiB |
+| moment.js | 169.83 KiB | 57.03 KiB | 18.20 KiB |
+| react.js | 70.45 KiB | 22.28 KiB | 8.00 KiB |
+| terser.js | 1.08 MiB | 444.92 KiB | 120.46 KiB |
+| three.js | 1.19 MiB | 628.03 KiB | 154.56 KiB |
+| typescript.js | 10.45 MiB | 3.17 MiB | 845.79 KiB |
+| victory.js | 2.30 MiB | 689.67 KiB | 153.65 KiB |
+| vue.js | 334.13 KiB | 112.95 KiB | 41.68 KiB |