Remove EUR/USD support — XAU/USD-only codebase

EUR/USD never had a validated edge (2026-07-11/12 verdict: no config
passed validation on M5/M15/H1 at 1-pip cost; cost-to-volatility root
cause). Removed: EurUsdStrategyConfig, pair_signals/eurusd.py, EUR
gates 6h + weekend/day filters + strategy marker + trade geometry in
signal_aggregator, EUR pair registry/aliases in main.py and
gpu_backtest.py, EUR/USD news pair mappings, test_all.py Module 10.
Generic multi-currency news keyword infra kept (GBP/JPY/EUR keyword
table is not pair code). Full EUR history remains at 7d3fd95.

Suite: 162/162 green (was 187; 25 EUR-specific tests removed).

Claude-Session: https://claude.ai/code/session_015kby7M9JwpYi8NQT2yoxAi

config.py

@@ -37,7 +37,6 @@ class MarketSession(Enum):
 
 # ── Supported pairs ──────────────────────────────────────────────
 XAUUSD = "XAU/USD"
-EURUSD = "EUR/USD"
 
 # price_precision: decimals for SL/TP rounding and display.
 # default_spread: round-trip cost per trade in price units, charged by
@@ -45,8 +44,6 @@ EURUSD = "EUR/USD"
 PAIR_INFO = {
     XAUUSD: {"display": "XAU/USD", "pip_value": 0.10, "is_jpy_pair": False,
              "price_precision": 2, "default_spread": 0.30},
-    EURUSD: {"display": "EUR/USD", "pip_value": 0.0001, "is_jpy_pair": False,
-             "price_precision": 5, "default_spread": 0.0001},
 }
 
 
@@ -165,7 +162,7 @@ class SignalConfig:
 @dataclass
 class NewsConfig:
     """Economic calendar & sentiment."""
-    tracked_currencies: List[str] = field(default_factory=lambda: ["USD", "XAU", "EUR"])
+    tracked_currencies: List[str] = field(default_factory=lambda: ["USD", "XAU"])
     pre_event_buffer_minutes: int = 30
     post_event_buffer_minutes: int = 15
     # Whether event risk gates the SIGNAL (danger: confidence hard-capped
@@ -278,54 +275,6 @@ class XauStrategyConfig:
     m5_pullback_touch_bars: int = 3
 
 
-@dataclass
-class EurUsdStrategyConfig:
-    """EUR/USD strategy config — separate from XAU for independent tuning.
-
-    Values ported from feature/eurusd-support are a pre-realism baseline
-    (tuned before spread charging and next-open fills) and are re-tuned
-    against the realistic backtester. Cost knobs (round_trip_cost,
-    min_tp_cost_multiple, min_sl_pips) are EUR-local so nothing
-    gold-calibrated from SignalConfig leaks into the EUR path.
-    """
-    enabled: bool = True
-    blocked_hours_utc: List[int] = field(default_factory=lambda: [22, 23, 0, 1, 2, 3])
-    weekend_filter: bool = True
-    allowed_weekdays: List[int] = field(default_factory=lambda: [0, 1, 2, 3, 4])
-    min_atr_threshold: float = 0.0003
-    sl_atr_multiplier: float = 1.5     # swing-buffer ATR multiple for SL placement
-    tp_atr_multiplier: float = 1.2
-
-    sl_atr_floor: float = 1.2
-    min_rr_ratio: float = 1.0
-    mature_move_threshold: float = 35.0
-    tp_quality_scale: Dict[str, float] = field(default_factory=lambda: {
-        "A+": 1.0, "A": 1.0, "B": 1.0, "C": 1.0,
-    })
-    blocked_regimes: List[str] = field(default_factory=lambda: ["ranging", "transitioning"])
-    min_quality_grades: List[str] = field(default_factory=lambda: ["A+", "A", "B"])
-    max_exhaustion_tags: int = 99
-    block_near_ema200: bool = False
-    session_hours: List[int] = field(default_factory=list)
-    min_entry_score: float = 38.0
-    min_entry_confidence: float = 60.0
-    block_rsi_extended: bool = True
-    blocked_vol_regimes: List[str] = field(default_factory=list)
-    min_indicator_agreement: int = 0
-    be_trigger_r: float = 0.3
-    be_buffer_r: float = 0.15
-
-    # ── EUR-local trade-cost knobs (replace SignalConfig's gold-dollar
-    # values in the EUR path) ─────────────────────────────────────────
-    # Round-trip cost per trade in price units (1.0 pip).
-    round_trip_cost: float = 0.0001
-    # Reject setups whose TP1 distance < round_trip_cost × this multiple
-    # (10 → 10-pip minimum target; EUR M5 ATR runs ~5-8 pips).
-    min_tp_cost_multiple: float = 10.0
-    # Minimum SL distance in pips.
-    min_sl_pips: float = 8.0
-
-
 @dataclass
 class FilterConfig:
     """Regime and session filters for live signals."""
@@ -349,7 +298,6 @@ class PlatformConfig:
     news: NewsConfig = field(default_factory=NewsConfig)
     backtest: FilterConfig = field(default_factory=FilterConfig)
     xau_strategy: XauStrategyConfig = field(default_factory=XauStrategyConfig)
-    eur_strategy: EurUsdStrategyConfig = field(default_factory=EurUsdStrategyConfig)
 
     symbol: str = XAUUSD
     display_name: str = "XAU/USD"