feat: Add .remove method to deck class (#681)

doc/changelog/682.added.md

@@ -0,0 +1 @@
+feat: Add .remove method to deck class (#681)

src/ansys/dyna/core/lib/deck.py

@@ -91,6 +91,24 @@ def append(self, keyword: Union[KeywordBase, str], check=False) -> None:
         else:
             self._keywords.append(keyword)
 
+    def remove(self, index: int | list[int]) -> None:
+        """Remove a keyword from the collection by index.
+
+        Parameters
+        ----------
+        index : int or list of int, mandatory
+        """
+        try:
+            if isinstance(index, int):
+                del self._keywords[index]
+            elif isinstance(index, list):
+                for i in sorted(index, reverse=True):
+                    del self._keywords[i]
+            else:
+                raise TypeError("Input must be an integer or a list of integers.")
+        except IndexError:
+            raise IndexError(f"One or more indices {index} are out of range for the keywords list.")
+
     def _formatstring(self, string, check=False):
         """Format a string to be appended to the deck."""
         linelist = string.split("\n")