remove model-specific length limits

this enables pegasus-x to use 2048 word input

app.py

@@ -89,7 +89,7 @@ def proc_submission(
     length_penalty: float,
     repetition_penalty: float,
     no_repeat_ngram_size: int,
-    max_input_length: int = 1024,
+    max_input_length: int = 2048,
 ):
     """
     proc_submission - a helper function for the gradio module to process submissions
@@ -102,7 +102,7 @@ def proc_submission(
         length_penalty (float): the length penalty to use
         repetition_penalty (float): the repetition penalty to use
         no_repeat_ngram_size (int): the no repeat ngram size to use
-        max_input_length (int, optional): the maximum input length to use. Defaults to 768.
+        max_input_length (int, optional): the maximum input length to use. Defaults to 2048.
 
     Returns:
         str in HTML format, string of the summary, str of score
@@ -122,7 +122,6 @@ def proc_submission(
     st = time.perf_counter()
     history = {}
     clean_text = clean(input_text, lower=False)
-    max_input_length = 2048 if "base" in model_name.lower() else max_input_length
     processed = truncate_word_count(clean_text, max_words=max_input_length)
 
     if processed["was_truncated"]: