fix: avoid removesuffix as it's only 3.9+

Author: js2264

hicstuff/io.py

@@ -1458,15 +1458,15 @@ def check_fastq_entries(in_file):
             stderr=sp.PIPE,
             shell = True, 
             encoding = 'utf-8'
-        ).stdout.removesuffix("\n").split(" ")[0]
+        ).stdout[:-2].split(" ")[0]
     else:
         n_lines = sp.run(
             "wc -l {f}".format(f = in_file),
             stdout=sp.PIPE,
             stderr=sp.PIPE,
             shell = True, 
             encoding = 'utf-8'
-        ).stdout.removesuffix("\n").split(" ")[0]
+        ).stdout[:-2].split(" ")[0]
 
     n_reads = int(n_lines)/4
     return n_reads
@@ -1491,6 +1491,6 @@ def check_bam_entries(in_file):
         stdout=sp.PIPE,
         stderr=sp.PIPE,
         encoding = 'utf-8'
-    ).stdout.removesuffix("\n")
+    ).stdout[:-2]
 
     return int(n_reads)