docs: remove duplicate words (#27712)

Author: aanchal88

src/material/datepicker/month-view.ts

@@ -273,7 +273,7 @@ export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
   }
 
   /**
-   * Takes the index of a calendar body cell wrapped in in an event as argument. For the date that
+   * Takes the index of a calendar body cell wrapped in an event as argument. For the date that
    * corresponds to the given cell, set `activeDate` to that date and fire `activeDateChange` with
    * that date.
    *

src/material/datepicker/multi-year-view.ts

@@ -212,7 +212,7 @@ export class MatMultiYearView<D> implements AfterContentInit, OnDestroy {
   }
 
   /**
-   * Takes the index of a calendar body cell wrapped in in an event as argument. For the date that
+   * Takes the index of a calendar body cell wrapped in an event as argument. For the date that
    * corresponds to the given cell, set `activeDate` to that date and fire `activeDateChange` with
    * that date.
    *

src/material/datepicker/year-view.ts

@@ -192,7 +192,7 @@ export class MatYearView<D> implements AfterContentInit, OnDestroy {
   }
 
   /**
-   * Takes the index of a calendar body cell wrapped in in an event as argument. For the date that
+   * Takes the index of a calendar body cell wrapped in an event as argument. For the date that
    * corresponds to the given cell, set `activeDate` to that date and fire `activeDateChange` with
    * that date.
    *