diff --git a/api_ex/remove_sb_columns.py b/api_ex/remove_sb_columns.py
deleted file mode 100644
index 93f3f70..0000000
--- a/api_ex/remove_sb_columns.py
+++ /dev/null
@@ -1,32 +0,0 @@
-import csv
-from pathlib import Path
-
-# infile = Path(r"c:\copilot codes\dataclean\Flow_Timedata2025_new_format.csv")
-# outfile = Path(r"c:\copilot codes\dataclean\szh_flow_scada.csv")
-
-infile = Path(r"c:\copilot codes\dataclean\Pressure_Timedata2025_new_format.csv")
-outfile = Path(r"c:\copilot codes\dataclean\szh_pressure_scada.csv")
-
-with infile.open("r", newline="", encoding="utf-8") as f_in:
-    reader = csv.reader(f_in)
-    rows = list(reader)
-
-if not rows:
-    print("input file is empty")
-    raise SystemExit(1)
-
-headers = rows[0]
-# keep columns whose header does NOT contain 'SB_'
-keep_indices = [i for i,h in enumerate(headers) if 'SB_' not in h]
-removed = [h for i,h in enumerate(headers) if 'SB_' in h]
-
-with outfile.open("w", newline="", encoding="utf-8") as f_out:
-    writer = csv.writer(f_out)
-    for row in rows:
-        # ensure row has same length as headers
-        if len(row) < len(headers):
-            row = row + [''] * (len(headers) - len(row))
-        newrow = [row[i] for i in keep_indices]
-        writer.writerow(newrow)
-
-print(f"Wrote {outfile} — removed {len(removed)} columns containing 'SB_'.")