refactor: Delete legacy TRREB Python modules (#47)

- Delete portfolio_app/toronto/schemas/trreb.py
- Delete portfolio_app/toronto/parsers/trreb.py
- Delete portfolio_app/toronto/loaders/trreb.py
- Remove TRREB imports from __init__.py files

Part of Sprint 9: Toronto Neighbourhood Dashboard transition
See docs/changes/Change-Toronto-Analysis-Reviewed.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

portfolio_app/toronto/parsers/__init__.py

@@ -7,10 +7,8 @@ from .geo import (
     TRREBDistrictParser,
     load_geojson,
 )
-from .trreb import TRREBParser
 
 __all__ = [
-    "TRREBParser",
     "CMHCParser",
     # GeoJSON parsers
     "CMHCZoneParser",

portfolio_app/toronto/parsers/trreb.py

@@ -1,82 +0,0 @@
-"""TRREB PDF parser for monthly market watch reports.
-
-This module provides the structure for parsing TRREB (Toronto Regional Real Estate Board)
-monthly Market Watch PDF reports into structured data.
-"""
-
-from pathlib import Path
-from typing import Any
-
-from portfolio_app.toronto.schemas import TRREBMonthlyRecord, TRREBMonthlyReport
-
-
-class TRREBParser:
-    """Parser for TRREB Market Watch PDF reports.
-
-    TRREB publishes monthly Market Watch reports as PDFs containing:
-    - Summary statistics by area (416, 905, Total)
-    - District-level breakdowns
-    - Year-over-year comparisons
-
-    The parser extracts tabular data from these PDFs and validates
-    against the TRREBMonthlyRecord schema.
-    """
-
-    def __init__(self, pdf_path: Path) -> None:
-        """Initialize parser with path to PDF file.
-
-        Args:
-            pdf_path: Path to the TRREB Market Watch PDF file.
-        """
-        self.pdf_path = pdf_path
-        self._validate_path()
-
-    def _validate_path(self) -> None:
-        """Validate that the PDF path exists and is readable."""
-        if not self.pdf_path.exists():
-            raise FileNotFoundError(f"PDF not found: {self.pdf_path}")
-        if not self.pdf_path.suffix.lower() == ".pdf":
-            raise ValueError(f"Expected PDF file, got: {self.pdf_path.suffix}")
-
-    def parse(self) -> TRREBMonthlyReport:
-        """Parse the PDF and return structured data.
-
-        Returns:
-            TRREBMonthlyReport containing all extracted records.
-
-        Raises:
-            NotImplementedError: PDF parsing not yet implemented.
-        """
-        raise NotImplementedError(
-            "PDF parsing requires pdfplumber/tabula-py. "
-            "Implementation pending Sprint 4 data ingestion."
-        )
-
-    def _extract_tables(self) -> list[dict[str, Any]]:
-        """Extract raw tables from PDF pages.
-
-        Returns:
-            List of dictionaries representing table data.
-        """
-        raise NotImplementedError("Table extraction not yet implemented.")
-
-    def _parse_district_table(
-        self, table_data: list[dict[str, Any]]
-    ) -> list[TRREBMonthlyRecord]:
-        """Parse district-level statistics table.
-
-        Args:
-            table_data: Raw table data extracted from PDF.
-
-        Returns:
-            List of validated TRREBMonthlyRecord objects.
-        """
-        raise NotImplementedError("District table parsing not yet implemented.")
-
-    def _infer_report_date(self) -> tuple[int, int]:
-        """Infer report year and month from PDF filename or content.
-
-        Returns:
-            Tuple of (year, month).
-        """
-        raise NotImplementedError("Date inference not yet implemented.")