fix: input textarea hadle when affix (#2530)

Author: xrkffgg

components/input/style/index.less

@@ -24,11 +24,6 @@
 .@{ant-prefix}-input-affix-wrapper {
   .reset-component;
   .input-affix-wrapper(~'@{ant-prefix}-input');
-
-  // https://github.com/ant-design/ant-design/issues/6144
-  .@{ant-prefix}-input {
-    min-height: 100%; // use min-height, assume that no smaller height to override
-  }
 }
 
 .@{ant-prefix}-input-password-icon {