Revert "style: Default dropdown text color"

This reverts commit 3b3cf51.

Author: lucaslarroche

scss/components/_dropdown.scss

@@ -115,6 +115,7 @@
         border: var(#{$✨}border-width) solid var(#{$✨}form-element-border-color);
         border-radius: var(#{$✨}border-radius);
         background-color: var(#{$✨}form-element-background-color);
+        color: var(#{$✨}form-element-placeholder-color);
         line-height: inherit;
         cursor: pointer;