feat(ui5-ai-textarea): apply UX feedback adjustments

clean up styles

Author: ndeshev

packages/ai/src/TextArea.css

@@ -20,26 +20,6 @@
 	flex-shrink: 0;
 }
 
-.ui5-ai-writing-assistant-footer-bar {
-	background: var(--_ui5_texteditor_toolbar_background, var(--sapPageFooter_Background));
-	width: 100%;
-	box-sizing: border-box;
-	box-shadow: none;
-	border-bottom: none;
-	border-top: none;
-}
-
 .ui5-ai-writing-assistant-footer-bar--with-border {
 	border-top: 1px solid var(--sapPageFooter_BorderColor);
 }
-
-.ui5-ai-writing-assistant-action-label {
-	margin-left: 0.5rem;
-	color: var(--sapContent_LabelColor);
-	font-size: var(--sapFontSmallSize);
-}
-
-#ai-menu-wrapper {
-	position: relative;
-	z-index: 1000;
-}

packages/ai/src/themes/WritingAssistant.css

@@ -1,24 +1,3 @@
-.ui5-ai-textarea-root {
-	position: relative;
-	display: flex;
-	flex-direction: column;
-	width: 100%;
-	height: 100%;
-}
-
-.ui5-ai-textarea-root .ui5-textarea-wrapper {
-	display: flex;
-	flex-direction: column;
-	flex: 1;
-	position: relative;
-}
-
-.ui5-ai-textarea-root [part="footer"] {
-	width: 100%;
-	margin-top: auto;
-	flex-shrink: 0;
-}
-
 .ui5-ai-writing-assistant-footer-bar {
 	background: var(--_ui5_texteditor_toolbar_background, var(--sapPageFooter_Background));
 	width: 100%;