chore(gui-v2): remove placeholders for *Picker cells

packages/nc-gui-v2/components/cell/DatePicker.vue

@@ -55,7 +55,7 @@ watch(
   { flush: 'post' },
 )
 
-const placeholder = computed(() => (isDateInvalid ? 'Invalid date' : readOnly ? 'Select date' : ''))
+const placeholder = computed(() => (isDateInvalid ? 'Invalid date' : ''))
 </script>
 
 <template>

packages/nc-gui-v2/components/cell/DateTimePicker.vue

@@ -64,7 +64,7 @@ watch(
     :bordered="false"
     class="!w-full px-1"
     format="YYYY-MM-DD HH:mm"
-    :placeholder="isDateInvalid ? 'Invalid date' : !readOnly ? 'Select date and time' : ''"
+    :placeholder="isDateInvalid ? 'Invalid date' : ''"
     :allow-clear="!readOnly"
     :input-read-only="true"
     :dropdown-class-name="randomClass"

packages/nc-gui-v2/components/cell/TimePicker.vue

@@ -75,7 +75,7 @@ watch(
     use12-hours
     format="HH:mm"
     class="!w-full px-1"
-    :placeholder="isTimeInvalid ? 'Invalid time' : !readOnly ? 'Select time' : ''"
+    :placeholder="isTimeInvalid ? 'Invalid time' : ''"
     :allow-clear="!readOnly"
     :input-read-only="true"
     :open="readOnly ? false : open"

packages/nc-gui-v2/components/cell/YearPicker.vue

@@ -53,7 +53,7 @@ watch(
   { flush: 'post' },
 )
 
-const placeholder = computed(() => (isYearInvalid ? 'Invalid year' : readOnly ? 'Select year' : ''))
+const placeholder = computed(() => (isYearInvalid ? 'Invalid year' : ''))
 </script>
 
 <template>